forge

forge is a skill for Claude Code, Codex from emilvaintrub/ShowRunner. It costs 55 tokens per session (925 once invoked), scanned A, original, MIT.

A structured product-planning skill for turning an idea into an agreed direction. It helps define the product, its phases, feature decisions, and design brief through collaboration with the person making the product.

In plain words
What is it for?
Initializing product work, discovering product principles, planning phases, writing complete feature specifications, recording decisions, and preparing design briefs.
Why use it?
It records important product choices and prevents the agent from quietly deciding them on the user’s behalf.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the showrunner plugin — 7 skills shipped together

Good fit Initializing product work, discovering product principles, planning phases, writing complete feature specifications, recording decisions, and preparing design briefs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/emilvaintrub/showrunner/forge
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add emilvaintrub/ShowRunner --skill forge
Clone the repo
git clone --depth 1 https://github.com/emilvaintrub/ShowRunner

Made for: Claude Code, Codex.

Or install showrunner, the plugin that ships this one along with the rest of its 7 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for forge

README.md
[![agentmods](https://agentmods.dev/badge/skills/emilvaintrub/showrunner/forge/github.svg)](https://agentmods.dev/skills/emilvaintrub/showrunner/forge)
Your own site
<a href="https://agentmods.dev/skills/emilvaintrub/showrunner/forge"><img src="https://agentmods.dev/badge/skills/emilvaintrub/showrunner/forge/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for forge

Your own site · 80×15
<a href="https://agentmods.dev/skills/emilvaintrub/showrunner/forge"><img src="https://agentmods.dev/badge/skills/emilvaintrub/showrunner/forge.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 925 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00055 $0.00925
Opus 5.5 $0.00022 $0.00370
Sonnet 5.5 $0.00011 $0.00185
Haiku 4.5 $0.00006 $0.00093

Measured today against content hash 311d95ac5af4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

forge scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

showrunner/forge/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Forge

Turn intent into approved direction. Collaborate with the inventor; do not dispatch Forge runtime work.

Load

  1. Read ../core/lifecycle.md and ../core/method.md.
  2. Read the active project's .claude/showrunner/config.md and the state ledger it names in lifecycle.state_file (default .claude/showrunner/state.md).
  3. Read method.md.
  4. Load only the template required by the requested command.

Route

Forge runs project stages P2-P4 and initiative stages 2-6. The conductor starts each one; the owner never has to name it. For discovery and assessment, load discovery.md and knowledge/inquiry-bank.md; for assessment, also load ../core/evidence.md.

Stage Command Output
setup (Forge part) init Forge config section
discovery discover owner profile; templates/discovery-brief.md after full inquiry coverage
assessment assess templates/assessment.md with cited research and the owner's verdict
constitution discover (constitution) templates/soul.md drawn from the confirmed brief and assessment, then automatic init re-validation
roadmap plan initiative inquiry answers, then templates/project.md with ## Surfaces
spec spec templates/spec.md sections 1-8
design design templates/designer-brief.md rendered through templates/adapters/<forge.designer_helper.tool>.md
design-review design-review returned design output reviewed against the brief's Design Review Package
handoff spec (sections 9-11) spec marked arc-ready

steer is not a stage either: it runs whenever the owner raises an idea or changes their mind, at any stage, following steering.md and recording in templates/ideas-log.md. The conductor starts it on its own when it classifies an owner message as an idea or steer.

Read the full file on GitHub · 74 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. today Changed · +1 lines 311d95ac5af4
  2. 1mo ago Changed · +23 lines 23e9ebb59267
  3. 2mo ago First seen · 50 lines · 55 tokens per session scan A 08f68d548bbf

Subscribe to this mod's changes

forge is a skill published in the GitHub repository emilvaintrub/ShowRunner (2 stars, last pushed yesterday), licensed MIT. It adds 55 tokens to every session and 925 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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